Feeding mechanism for sewing-machines



(No Model.) 7 3 Sheets-Sheet 1.

J.VANNETTE. Y IEEDING MECHANISM FOR SEWING MACHINES.

No. 543,068 7 Patented July 23, 1895.

Ill um mm M MW; H:

(No Model.) Q 3 Sheets-Sheet 2. J. VANNETTE.

FEEDING MECHANISM FOR SEWING MACHINES. No. 543,668. 1 Patented July 23,1895.

(No Model.) M

-' J. VANNETTE.

FEEDING MECHANISM FOR SEWING MACHINES. No. 543,068. Patented July 23,1895.

' 3 Sheets-Sheet 3.

UNITE STATES PATENT OFFICE.

JASPER VAN-NETTE, OF. TIFFIN, OHIO, ASSIGNOR TO THE SINGER MANUFAC-TUBING COMPANY, OF NEW JERSEY.

FEEDING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 543,068, dated July 23,1895.

Applicatio fi June 27,1892. Serial 110.438.168. (No model.)

To all whom it may concern:

Be it. known that I, JASPER. VANNETTE, a citizen of the United States,residing atTiffin, in the county of Seneca and State of Ohio, haveinvented certain new and useful Improvements in Feeding Mechanism forSewing-Machines, of which the following is a specification, referencebeing had therein to the accompanying drawings.

My invention has for its object to provide a novel feeding mechanismforsewing-machines, which will be strong and positive in its operationand which can be easily regulated, while the machine is in motion, toproduce a feeding movement of any desired extent.

In carrying my invention into effect I furnish a rotating shaft, whichis arranged beneath the work-plate of the machine, with two cams, one ofwhich is embraced by a yoke formed on one arm of a transverse leverpivoted between its ends, the other arm of said lever having a groove inwhich fits an adjustable pin on a regulating-link,'said pin thus forminga connection between the said grooved arm of the said lever and asimilar grooved horizontal arm of a bell-crank-operating lever, thevertical arm of which is jointed to a frame carrying the feed-dog, saidframe being provided with a yoke embracing the the other of the camsabove referred to. The link which carries the pin forming the adjustable connection between the two levers above mentioned is jointed atone end to an arm of a regulating-shaft, the position of which may bechanged to vary the position of the adjustable pin, and thereby regulatethe throw of the feed-dog. The regulating-pin is preferably providedwith blocks or slides pivoted thereon and which fit closely in thegrooved arms of the levers.

In the accompanying drawings, Figure 1 is a bottom view of asewing-machine embodying my invention, some parts not relating to thefeeding mechanism being omitted for clearness of illustration. Fig. 2 isan end view looking from the left of Fig 1, and Fig. 3 is across-section on the line 3 3 of Fig. 1. Fig. 4. is a detailcross-section showing the connection between the grooved arms of thefeed-operating levers. Fig. 5 is a detail crosssection on line 4. 4.,Fig. 1, looking in the direction of the arrow adjacent thereto; and Fig.6 is a detail section on line 5 5 of Fig 1. Fig. 7 is a partiallongitudinal section of the machine, and Fig. 8 is a detail perspectiveview of a portion of the feeding mechanism.

A denotes the bed-plate of the machine, and B a rotating shaft journaledin suitable lugs or hangers depending from said bedeplate, said rotatingshaft being operated in any suitable way, as by a pitman-leverconnection with the driving-shaft in the upper portion of the arm of themachine. The shaft B is provided with two cams b and b, the former beingembraced by a yoke 0, formed on a transverse lever 0, said lever beingpivoted on 'a pin a, attached to a bracket or lug a, depending from thebed-plate A.

D denotes a bell-crank lever, pivoted on a 0 pin a carried by a hangeror bracket a the vertical arm of said leverbeingjointed to the frame Eby pin a said frame having an arm 6, carrying the feed dog 6', the saidframe being also provided-with a yoke 6 embracing the cam b on therotating shaft B. The horizontal arm d of the bell-crank lever D isprovided with a groove, and the arm 0' of the lever O is similarlygrooved, these two arms being arranged adjacent to each other, as moreclearly shown in Figs. 1, 4, and 7, and being connected by an adjustablepinfat the free end of the link F, the opposite end of the said linkbeing jointed to an arm g of a feed-regulating shaft G, provided at itsrear end with an arm g, having a set-nut g at its upper end, said nutengaging with a segmental portion or abutment a of the bed-plate A tohold the said shaft G in any position in which it may be placed. Thepinfis prefero ably provided with two blocks f, fitting in the groovesin the arms 0' and dof the levers C and D, these blocks sliding back andforth in the grooves of the said arms when the connecting-pin isadjusted by means of the shaft 5 Gand link F, and the said blocksrocking freely on the pinfwhen the machine is in operation.

When the shaft B is set in motion, the cam b thereon will impart avibrating motion'to no the lever O, and the latter, through itsabovedescribed connection with the lever D, 'will cause the latter tovibrate and thereby impart back-and-forth movements to the frame E andto the feed-dog carried thereby, the extent of the said back-and-forthmovements of the said frame E and of the feed-dog being determined bythe position of adjustment of the pin fon the link F. Thus if the saidpin f be so adjusted that it is coincident with the pin a, which formsthe fulcrum or pivot of the lever C, no motion will beimparted to thelever D, and the said feed-dog will, therefore, have no back-and-forthmovement; butwhen the said pin f is moved so that it is not coincidentwith the fulcrum of the lever C more or less movement will be impartedto thelever D and thus to the feed-dog, the extent of such movementsbeing determined by the position of adjustment of the said pinf, thisbeing controlled by the regulating-shaft G.

The up-and-down movements of the feeddog are imparted thereto from thecam 12, rotating in the yoke e on the frame E, said movements, it willbe observed, being positive in both directions.

It will of course be understood that the cams b and b are so arrangedrelatively to each other that they will operate alternately, so as firstto move the feed upward, then forward, then downward, and backward, asis usual in fourmotioned feeds, this timing of the feed-cams being awell-known feature of sewing-machine feeding mechanisms.

Having thus described my invention, I claim and desire to secure byLetters Patent- 1. In a sewing machine, the combination with a rotatingshaft arranged beneath the work plate thereof and provided with twocams, of a transverse lever pivoted between its ends one arm of saidlever having a yoke embracing one of said cams and the other arm of saidlever being provided with a groove, a bell-crank lever having a groovedarm arranged adjacent to the grooved arm of the said transverse lever,an adjustable pin formingthe connection between said grooved arms ofsaid levers, a frame connected to said bellcrank lever and provided withan arm carrying the feed dog said frame also having a yoke embracing theother of said cams, and means for adjusting said pin so as to vary thethrow of the said bell crank lever, and thereby regulate the horizontalmovements of the said feed dog. r

2. In a sewing machine, the combination with the rotating shaft Bprovided with the cams b and Z), of the transverse lever G having a yokeembracing the said cam Z), and havin g a grooved arm 0, a bell-cranklever D having a grooved arm d, a pinfforming a connection between thesaid grooved arms of said levers, the link F by which said pin iscarried, the feed regulating shaft G having the arms 9 and g, the latterprovided with a set nut cooperating with a fixed abutment to hold saidshaft in any position of adjustment, and the frame E connected to saidlever D and provided with the arm a carrying the feed dog 6, said framebeing also provided with a yoke e embracing the said cam b.

In testimony whereof I affix my signatn re in presence of two witnesses.

JASPER VANNE1"E. Witnesses:

(J. J. YINGLING, J. C. S'roNEa,

